fix(version): allow v2 update if on latest v1

Author: acburdine

lib/utils/version.js

@@ -85,7 +85,7 @@ const utils = {
         return parsed.version;
     },
 
-    checkActiveVersion(activeVersion, latest, opts = {}) {
+    checkActiveVersion(activeVersion, versionToUse, latestV1, opts = {}) {
         const activeMajor = semver.major(activeVersion);
 
         if (opts.v1 && activeMajor > 1) {
@@ -96,19 +96,19 @@ const utils = {
             });
         }
 
-        if (semver.lte(latest, activeVersion) && !opts.force) {
+        if (semver.lte(versionToUse, activeVersion) && !opts.force) {
             return null;
         }
 
-        if (activeMajor === 1 && semver.diff(activeVersion, latest) === 'major') {
-            const latestMajor = semver.major(latest);
+        if (activeMajor === 1 && activeVersion !== latestV1 && semver.diff(activeVersion, versionToUse) === 'major') {
+            const majorToUse = semver.major(versionToUse);
             throw new CliError({
-                message: `You are trying to update to Ghost v${latestMajor}, but your blog is not on the latest Ghost 1.0 version`,
+                message: `You are trying to update to Ghost v${majorToUse}, but your blog is not on the latest Ghost 1.0 version`,
                 help: 'Instead run "ghost update --v1".'
             });
         }
 
-        return latest;
+        return versionToUse;
     },
 
     async resolveVersion(customVersion = null, activeVersion = null, opts = {}) {
@@ -130,7 +130,7 @@ const utils = {
             return latest;
         }
 
-        return utils.checkActiveVersion(activeVersion, latest, opts);
+        return utils.checkActiveVersion(activeVersion, latest, versions.latestMajor.v1, opts);
     },
 
     async versionFromZip(zipPath, activeVersion = null, opts = {}) {

test/unit/utils/version-spec.js

@@ -130,7 +130,7 @@ describe('Unit: Utils: version', function () {
     describe('checkActiveVersion', function () {
         it('throws if --v1 is passed and active version is >= 2.0', function () {
             try {
-                checkActiveVersion('2.0.0', '2.1.0', {v1: true});
+                checkActiveVersion('2.0.0', '2.1.0', '1.0.0', {v1: true});
             } catch (error) {
                 expect(error).to.be.an.instanceof(CliError);
                 expect(error.message).to.contain('v2 or greater');
@@ -157,8 +157,13 @@ describe('Unit: Utils: version', function () {
             expect.fail('expected an error to be thrown');
         });
 
+        it('allows upgrading from v1 if on latest v1', function () {
+            const result = checkActiveVersion('1.0.0', '2.0.0', '1.0.0');
+            expect(result).to.equal('2.0.0');
+        });
+
         it('returns version if active === latest and --force is supplied', function () {
-            const result = checkActiveVersion('3.0.0', '3.0.0', {force: true});
+            const result = checkActiveVersion('3.0.0', '3.0.0', '1.0.0', {force: true});
             expect(result).to.equal('3.0.0');
         });